Diagnostic Accuracy Of Aortic Valve Ca-score In Patients With Low Gradient And High Gradient Aortic Stenosis

Introduction: The gold standard imaging modality for diagnosing aortic stenosis (AS) is echocardiography (echo). The definition of severe AS is based on the transvalvular mean gradient (AMG) (>40 mmHg) and aortic valve area (AVA) (<1 cm2). However, in around one-quarter of the cases, echo provides inconsistent findings (AVA<1 cm2, despite an AMG <40 mmHg), complicating clinical decision-making. Computed tomography aortic valve Ca-scoring (CT-AVC) offers an alternative diagnostic method. Current guidelines recommend CT-AVC to decide on the severity in cases with discordant echo measurements. We aimed to validate the sensitivity of the recommended calcium score (CAS) thresholds within our patient population and identify any factors associated with below cut-off CAS values despite confirmed severe AS.